Improvement in windmills



NITED STATES MATHEW M. TRIMBLE, 0F DES MOINES, AssIG voR or ONE-THIRDTOFRED. A. SMALL, on EARLHAM, IOWA.

IMPROVEMENT IN WINDMILLS.

Specification forming part of Letters Patent No. 184.053, dated November7, 1876; application filed January 26, 1876.

To all whom it may concern:

Be it known that I, MATHEW M. TRIMBLE, of Des Moines, in the county ofPolk and State of Iowa, have invented an Improved Windmill, of which thefollowing is a specification:

The object of my invention is to improve the construction and reduce thecost of a windmill that is practically self-governing while inoperation, and readily made inoperative by simply changing the positionof a pendent weight.

It consists in the manner of arranging and combining, upon a revolvingplatform, a windwheel, a major pivoted vane, a minor fixed vane, and afixed weight-bearer, all as hereinafter fully set forth.

My drawing is a perspective view illustrating the construction andoperation of my invention.

A represents the revolving horizontal platform, cast complete in onepiece. It has a round opening, a, in its center, and a pivotal bossaround the'opening, on its under side. B is a bracket, bolted to the topof the post 0. This bracket has a bearing, corresponding with the bossaround the central opening a in the platform, to which the platform issecured, and upon which it revolves. b b are shaft-bearings, rigidlyfixed on the top and ends of the platform A. c c is a horizontal shaft,to the end of which the wind-wheel D is rigidly attached. g is a pitman,connected with the crank of the shaft 0, and designed to communicatepower from the wheel to a pump or other machinery that is to beoperated. No. 1 is a major vane, pivoted on top of the platform A, andaside of its pivotal center, and to one side of the center of the wheelD, and its shaft 0, to prevent it from beinga per fect balance to thewind-power applied to the wheel D. m represents a track on the top ofthe platforn concentric with the pivot n, which secures the arm of thevane N o. 1. This track may be formed in any suitable manner to make abearing for the pivoted vane- No. 2 is a minor vane, rigidly fixed tothe platform A, at right angles to the shaft 0. H is a weighted bearerin the form of an arm, rigidly fixed to the platform A, parallel to themajor vane No. 1, and on the opposite side of the central opening a. pis a pulley carried by the arm H. r is a rope or chain fastened to thevane No. 1, and passed over the pulley p, on the arm H. pendent end ofthe chain 1'. t is a pulley attached to the minor vane No.2. X is achainfastened to the major vane N o. 1, and passed over the pulley t on thevane No. 2.

In the practical operation of my windmill, the major vane is always indirect line with the Wind. In its normal condition the wheel D is alwayssquarely at right angles with the major vane regardless of the movementsof this pivoted major vane. (The center of the wheel D not being indirect line with the pivot 91. of the major vane, the No. 2

minor vane is requiredas a balance to keep the wheel and the major vanebalanced at right angles to each other.) A superabundance of windpressing upon the wheel and the minor vane will revolve the platform A,and carry the minor *vane toward the major vane, and at the same timecarry the arm 11 away from the major vane, which remains in direct linewith the wind. The arm H receding from the major vane shortens the chain1 and lifts the weight 8, which thus becomes a ballast for thesuperabundant wind. When the superabundant wind-pressure is over theweight 8 will descend and reverse the movement of the platform, andbring all the parts into their normal positions again. A completeautomatic governor is thus provided.

To make and maintain the mill inoperative, remove the weight 8 from thechain 1' and attach it to the chain w. This will bring the wheel and thetwo vanes parallel to each other and all in line with the wind, and yetfree to veer about with the revolving platform as often as the directionof the wind changes.

I am aware that a pivoted vane has been carried by a revolving platform.I am also aware that a wind-wheel, a pivoted vane, and a fixed side vaneor wind-gage have been carried on a revolving platform, and theirpositions relative to each other and the diirection of the wind changedby means of a weight, but I claim that my manner of arranging,combining, and operating a wind- PATENT OFFICE. I

HIS RIGHT s is a weight attached to the wheel, a pivoted vane, a fixedvane, and a fixed weight-bearer upon a post, and revolving platform orturn-table,is new and greatly advantageous in wind-motors. I claim as myinvent-ion- 1. Therevolving platform A, having the -fiized vane No. 2,and the fixed Weight-bearer H projecting at right angles toieach other,in combination with the intermediate pivoted vane No.1, and the chains1" and m, alternately carrying the weight 8, substantially as and forthe purposes shown and described.

2. The revolving platform A, carrying the wheel, the fixed weight-bearerH, the pivoted vane No. 1, the fixed vane No. 2, the chains 1' and a0,and the adjustable Weight 8, in combination with the bracket B and post0, sub: stantially as and for the purposes shownand described; Y

MATHEW M. TEIMBLE.

Witnesses;

R. G. ()RWIG, G. A. J oHNsoN.

